<!--
 * @Author: 你的名字
 * @Date: 2022-09-21 15:07:19
 * @FilePath: /demo-gather/src/components/normal/CoolButton.vue
 * @Description: 
-->
<template>
  <div id="btnWrapper">
    <div class="btn active">开灯</div>
    <div class="btn">关灯</div>
  </div>
</template>

<script>
export default {
  data() {
    return {};
  },
  mounted() {
    let _this= this;
    let wrapper = document.getElementById("btnWrapper");
    wrapper.style.setProperty("--groove-left", "12px");
    let btns = document.getElementsByClassName("btn");
    for (let i = 0; i < btns.length; i++) {
      btns[i].addEventListener("click", function () {
        _this.ThemeChange(i === 1);
        _this.resetBtn(btns);
        wrapper.style.setProperty("--groove-left", `calc(12px + ${i * 50}%)`);
        wrapper.style.setProperty(
          "--wraper-origin",
          `${i === 0 ? "75% top" : "25% top"}`
        );
        wrapper.style.setProperty("--wraper-rotate", `${i === 0 ? -8 : 8}deg`);
        wrapper.className = "rotateWrap";
        setTimeout(() => {
          btns[i].className = "btn active";
        }, 500);
        setTimeout(() => {
          wrapper.className = "";
        }, 550);
      });
    }
  },
  methods: {
    // 重置按钮类名
    resetBtn(btns) {
      for (let i = 0; i < btns.length; i++) {
        setTimeout(() => {
          btns[i].className = "btn";
        }, 100);
      }
    },
    // 改变主题
    ThemeChange(bol) {
      let body = document.body;
      body.className = bol ? "dark" : "";
    },
  },
};
</script>

<style>
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
body {
  background-color: #edf1f4;
  perspective: 500px;
  --c-wrap-shadow1: #f5f9fd;
  --c-wrap-shadow2: #d8dbe5;
  --c-wrap-bg: #e2e6eb;
  --c-btn-shadow1: #d9dbe6;
  --c-btn-shadow2: #f5f9fd;
  --c-txt1: #aaa;
  --c-txt2: #111;
  transition: background-color 0.4s linear;
}
.dark {
  background-color: #333;
  --c-wrap-shadow1: #292929;
  --c-wrap-shadow2: #202020;
  --c-wrap-bg: #505050;
  --c-btn-shadow1: #323232;
  --c-btn-shadow2: #444;
  --c-txt1: #888;
  --c-txt2: #fff;
}
#btnWrapper {
  position: relative;
  width: 380px;
  height: 80px;
  padding: 12px 16px;
  margin: 300px auto 0;
  border-radius: 12px;
  overflow: hidden;
  background-color: var(--c-wrap-bg);
  box-shadow: -10px -10px 15px var(--c-wrap-shadow1),
    10px 10px 15px var(--c-wrap-shadow2);
  transform-origin: var(--wraper-origin);
  transition: transform 0.4s cubic-bezier(0, 0, 0.48, 1), box-shadow 0.4s linear,
    background-color 0.4s linear;
}
.rotateWrap {
  transform: rotateY(var(--wraper-rotate));
}
#btnWrapper::before {
  content: "";
  position: absolute;
  left: var(--groove-left);
  top: 12px;
  width: calc(50% - 16px - 8px);
  height: calc(100% - 24px);
  border-radius: 12px;
  box-shadow: inset 8px 8px 6px var(--c-btn-shadow1),
    inset -5px -5px 15px var(--c-btn-shadow2),
    inset -5px -5px 15px var(--c-btn-shadow2),
    inset 7px 7px 6px var(--c-btn-shadow1);
  transition: left 1s cubic-bezier(0.82, 0.12, 0.18, 0.88),
    box-shadow 0.4s linear;
}
.btn {
  float: left;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50%;
  height: 100%;
  padding: inherit;
  color: var(--c-txt1);
  transition: color 0.4s linear;
  animation: txtOutScale 0.6s linear;
  cursor: pointer;
}
.active {
  color: var(--c-txt2);
  transform: scale(1.1);
  animation: txtEnterScale 0.4s linear;
}
@keyframes txtEnterScale {
  0% {
    transform: scale(1);
  }

  80% {
    transform: scale(1.15);
  }

  100% {
    transform: scale(1.1);
  }
}
@keyframes txtOutScale {
  0% {
    transform: scale(1.1);
  }

  80% {
    transform: scale(0.95);
  }

  100% {
    transform: scale(1);
  }
}
</style>